Adds armv5 build and test target.

tools/gyp/configurations_make.gypi

 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'dart_debug_optimization_level%': '2',
   },
   'target_defaults': {
     'configurations': {
@@ skipping 63 matching lines @@
       'Dart_Linux_arm_Base': {
         'abstract': 1,
         'cflags': [
           '-marm',
           '-mfpu=vfp',
           '-Wno-psabi', # suppresses va_list warning
           '-fno-strict-overflow',
         ],
       },
 
+      # ARMv5 cross-build
+      'Dart_Linux_xarmv5_Base': {
+        'abstract': 1,
+        'target_conditions': [
+        ['_toolset=="target"', {
+          'cflags': [
+            '-mthumb',
+            '-mlong-calls',
+            '-march=armv5te',
+            '-mfloat-abi=soft',
+            '-Wno-psabi', # suppresses va_list warning
+            '-fno-strict-overflow',
+          ],
+        }],
+        ['_toolset=="host"', {
+          'cflags': ['-m32', '-msse2'],
+          'ldflags': ['-m32'],
+        }]]
+      },
+
+      # ARMv5 native build
+      'Dart_Linux_armv5_Base': {
+        'abstract': 1,
+        'cflags': [
+          '-mthumb',
+          '-mlong-calls',
+          '-march=armv5te',
+          '-mfloat-abi=soft',
+          '-Wno-psabi', # suppresses va_list warning
+          '-fno-strict-overflow',
+        ],
+      },
+
       # ARM64 cross-build
       'Dart_Linux_xarm64_Base': {
         'abstract': 1,
         'target_conditions': [
         ['_toolset=="target"', {
           'cflags': [ '-O3', ],
         }],
         ['_toolset=="host"', {
           'cflags': ['-O3', '-m64', '-msse2'],
           'ldflags': ['-m64'],
@@ skipping 74 matching lines @@
             ],
           }],
         ],
         'cflags': [
           '-O3',
         ],
       },
     },
   },
 }